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/*
** Copyright 2000 Double Precision, Inc.
** See COPYING for distribution information.
*/
#include "config.h"
#include "spipe.h"
#if HAVE_SPIPE_SOCKETPAIR
#include <sys/types.h>
#include <sys/socket.h>
int libmail_streampipe(int fd[2])
{
return (socketpair(PF_UNIX, SOCK_STREAM, 0, fd));
}
#endif
#if HAVE_SPIPE_SVR3
/* This is, basically, Stevens */
#include <sys/types.h>
#include <sys/stream.h> /* defines queue_t */
#include <stropts.h> /* defines struct strfdinsert */
#include <fcntl.h>
#define SPX_DEVICE "/dev/spx"
int /* return 0 if OK, -1 on error */
libmail_streampipe(int fd[2])
/* two file descriptors returned through here */
{
struct strfdinsert ins;
queue_t *pointer;
/*
* First open the stream clone device "/dev/spx" twice,
* obtaining the two file descriptors.
*/
if ( (fd[0] = open(SPX_DEVICE, O_RDWR)) < 0)
return(-1);
if ( (fd[1] = open(SPX_DEVICE, O_RDWR)) < 0) {
close(fd[0]);
return(-1);
}
/*
* Now link these two streams together with an I_FDINSERT ioctl.
*/
ins.ctlbuf.buf = (char *) &pointer; /* no ctl info, just the ptr */
ins.ctlbuf.maxlen = sizeof(queue_t *);
ins.ctlbuf.len = sizeof(queue_t *);
ins.databuf.buf = (char *) 0; /* no data to send */
ins.databuf.len = -1; /* magic: must be -1, not 0, for stream pipe */
ins.databuf.maxlen = 0;
ins.fildes = fd[1]; /* the fd to connect with fd[0] */
ins.flags = 0; /* nonpriority message */
ins.offset = 0; /* offset of pointer in control buffer */
if (ioctl(fd[0], I_FDINSERT, (char * ) &ins) < 0) {
close(fd[0]);
close(fd[1]);
return(-1);
}
return(0); /* all OK */
}
#endif
#if HAVE_SPIPE_SVR4
#include <stdio.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
int libmail_streampipe(int fd[2])
{
return (pipe(fd));
}
#endif
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